Effect of Phosphorus and Nitrogen on Thermal Decomposition Kinetics of Flame Retardant Cotton

Dynamic thermal gravimetric analysis under nitrogen was used to study the thermal decomposition kinetics of the greige cotton nonwoven fabrics, which were treated with the different ratios of phosphorus and nitrogen using diammonium phosphate and urea. The analysis focused on the effect of phosphorus and nitrogen on the decomposition activation energy. Four degradation models of Kissinger, Friedman, Flynn-Wall-Ozawa, and modified Coats-Redfern were used to determine the apparent activation energy of the flame retardant greige cotton fabrics. The variation of the activation energy provided better understanding of their thermal decomposition process in relation to flame resistance.